Atoms, Elements, and Compounds
A wrap up assessment.
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Name / Username *
What is the smallest particle of an element that can exist either alone or in combination? *
1000 points
What is made of molecules or atoms of the same kind? *
1000 points
What is a pure substance composed of two or more elements? *
1000 points
How small is a picometer? *
1000 points
What is the name of the positively charged dense region at the centre of an atom? *
1000 points
What is the nucleus composed of? (check all) *
1000 points
Required
An electrically charged atom is said to be... *
1000 points
An atom is typically around how many picometers across? *
1000 points
Protons have a... *
1000 points
The first atomic model was known as the... *
1000 points
The defining property of an element is its atomic number. This refers to the number of... *
1000 points
How many elements have been identified? *
1000 points
Are all elements naturally occurring? *
1000 points
Who is (generally) recognised as the inventor of the periodic table? *
1000 points
What is the chemical symbol for Iron? *
1000 points
What is the chemical symbol for Carbon? *
1000 points
What is the chemical symbol for Carbon Monoxide? *
1000 points
What is the main difference between a compound and an element? *
What does Sulphur Dioxide contain? (check all) *
1000 points
Required
What does Hydrogen Chloride contain? (check all) *
1000 points
Required
What does water contain? (check all) *
1000 points
Required
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